Partially prestressed concrete electric pole

Abstract

The invention discloses a partially prestressed concrete electric pole, which comprises reinforcing steel bars, concrete and erection rings, wherein the reinforcing steel bars comprise longitudinal stressed straight reinforcing steel bars and spiral reinforcing steel bars; the longitudinal stressed straight reinforcing steel bars comprise prestressed reinforcing steel bars and non-prestressed reinforcing steel bars, which are arranged at intervals and positioned in the spiral reinforcing steel bars; the concrete is poured in the electric pole; the erection rings are arranged in the electric role uniformly at certain intervals; the diameter of the electric pole is reduced sequentially from bottom to top; and the electric pole is fixedly connected with the ground through a flange and a grounding steel ring. The partially prestressed concrete electric pole has the advantages of superhigh bearing capacity, high flexibility, durability, no need of subsequent maintenance, low manufacturing cost, capacity of saving steel materials by 40 percent and the like, can replace a steel pipe electric pole and has high popularization and application values.

Description

technical field [0001] The invention discloses an annular electric pole, in particular to a partially prestressed concrete electric pole. Background technique [0002] There are two types of concrete poles: ordinary reinforced concrete poles and prestressed concrete poles. The cross-section of the pole has square, octagonal, I-shaped, circular or other special-shaped cross-sections. The most commonly used are circular cross-section and square cross-section. The length of the pole is generally 4.5 to 15 meters. There are two types of ring-shaped poles: tapered poles and equal-diameter poles. The true diameter of the tapered poles is generally 100-230 mm, and the taper is 1:75; the diameter of the equal-diameter poles is 300-550 mm; the wall thickness of both is 30-60 mm. [0003] In the 1980s, China developed the centrifugal method annular prestressed concrete pole. Its manufacturing process is mainly to stretch the steel wire frame longitudinally in the steel mold, and ...

AI Technical Summary

Problems solved by technology

[0004] Partially prestressed concrete poles in the prior art generally have relatively low strength and moment resistance, poor toughness and impact resistance, and are prone to circumferential cracks during production and use.

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